Pumpkin Banana Flax Chocolate Chip Muffins Pumpkin banana muffins with a boost of extra nutrition thanks to flaxseed meal! These delicious muffins taste like a cross between pumpkin and banana bread and are packed with fiber and omegas thanks to flaxseed meal and optional walnuts. Freezer-friendly and the perfect thing to make when you need to use up leftover pumpkin puree.